This simple image class will allow you to get an image from your server to dynamically resize it and center it top/bottom and left/right in a square box. If you have some images that are all good kb size but are a bit random in their dimensions, you can use this class to make them fit dynamically in a box. It will make images that are larger than the bounds of the box smaller, but will not adjust the size of images that are smaller than then bounds. That would make them blurry, so instead it just makes them centered in the box.
I am using this in a scenario where there are images that have been uploaded to the server that are very small 200x200 and rather large 1000x1200. The size of my display box in this example is 400x400.
Here is a demo: http://www.matthewaprice.com/image-resize-demo/